PowerIntHiperTFS－2系列300W电动自行车电源参考设计DER－472

PowerInt公司的HiperTFS-2系列TFS7701-7708集成了大功率开关正向转换器和中功率反激(待机)转换器,包括两开关正向和反激转换器,高边和低边驱动器,三个高压功率MOSFET,适用于高达586W主功率转换器(两开关正向)和高达28W待机转换器(反激)如PC,打印机,LCD TV,视频游戏控制台,大功率适配器和工业设备.本文介绍了HiperTFS-2系列产品亮点和主要优势,功能框图,以及300W电动自行车电源参考设计DER-472主要指标,电路图,材料清单和PCB设计图.

The HiperTFS-2 device family members incorporate both a high-power two-switch-forward converter and a mid-power flyback (standby) converter into a single, low-profile eSIP™ power package. The single chip solution provides the controllers for the two-switch-forward and flyback converters, high- and low-side drivers, all three of the high-voltage power MOSFETs, and eliminates the converter’s need for costly external pulse transformers. The device is ideal for high power applications that require both a main power converter (two-switch forward) up to 586 W peak, and standby converter (flyback) up to 20 W. HiperTFS-2 includes Power Integrations’ standard set of comprehensive protection features, such as integrated soft-start, fault and overload protection, and hysteretic thermal shutdown. HiperTFS-2 utilizes advanced power packaging technology that simplifies the complexity of two-switch forward layout, mounting and thermal management, while providing very high power capabilities in a single compact package. The devices operate over a wide input voltage range, and can be used following a power-factor correction stage such as HiperPFS.

Two-switch-forward power converters are often selected for applications demanding cost-effective converters that have high efficiency, fast transient response, and high rejection to line voltage variation. The two-switch-forward controller incorporated into HiperTFS-2 devices improves on the classic topology by allowing operation considerably above 50% duty cycle. This improvement reduces RMS current conduction...